enforcement will be out in force. if you can't take bart, muni, caltrain or anything else, you don't drive, here's a simple tip. fill your gas tank! sounds like a big doh, but you would be surprised. >> traffic slows down, people start to idle. they are on the road for a little longer than they anticipated. just make sure you have a full tank of gas before you get started. >> reporter: you run out of gas on the road, you're stuck. tow trucks are going to get stuck in traffic, too. but just in case, there will be extra tow trucks out there this weekend. but fill your tank. in san francisco, mike sugerman, cbs 5. >>> all that traffic could put bart on track to break some records. ken bastida is live with mobile5 to show us how the transit agency is gearing up for the weekend. ken. >>> reporter: hi, liz. we're up here on the platform of the daly city bart station. 419,000 people rode bart yesterday. that is a record. you had the oracle people in town, the as game over in oakland. but they expect to blow that up record this weekend with all the people in town that mike has been talking about.